... other penis bones that come to a blunt and abrupt end, it's thought that animals with more elaborate tips evolved under stronger sexual competition.
source https://www.google.com/url?rct=j&sa=t&url=https://www.livescience.com/why-animal-penis-bone-ice-cream-scoop-shape.html&ct=ga&cd=CAIyHGQ3ZjU4NDljNDFhNmE2ZTY6Y28uaW46ZW46SU4&usg=AFQjCNH23D6GjPK74shcHxrpNHRRjLaSaA
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